1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
4 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
5 */
6
7 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
8
9 #include <linux/slab.h>
10 #include <linux/spinlock.h>
11 #include <linux/completion.h>
12 #include <linux/buffer_head.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/gfs2_ondisk.h>
16 #include <linux/rcupdate.h>
17 #include <linux/rculist_bl.h>
18 #include <linux/atomic.h>
19 #include <linux/mempool.h>
20
21 #include "gfs2.h"
22 #include "incore.h"
23 #include "super.h"
24 #include "sys.h"
25 #include "util.h"
26 #include "glock.h"
27 #include "quota.h"
28 #include "recovery.h"
29 #include "dir.h"
30 #include "glops.h"
31
32 struct workqueue_struct *gfs2_control_wq;
33
gfs2_init_inode_once(void * foo)34 static void gfs2_init_inode_once(void *foo)
35 {
36 struct gfs2_inode *ip = foo;
37
38 inode_init_once(&ip->i_inode);
39 atomic_set(&ip->i_sizehint, 0);
40 init_rwsem(&ip->i_rw_mutex);
41 INIT_LIST_HEAD(&ip->i_ordered);
42 ip->i_qadata = NULL;
43 gfs2_holder_mark_uninitialized(&ip->i_rgd_gh);
44 memset(&ip->i_res, 0, sizeof(ip->i_res));
45 RB_CLEAR_NODE(&ip->i_res.rs_node);
46 ip->i_hash_cache = NULL;
47 gfs2_holder_mark_uninitialized(&ip->i_iopen_gh);
48 }
49
gfs2_init_glock_once(void * foo)50 static void gfs2_init_glock_once(void *foo)
51 {
52 struct gfs2_glock *gl = foo;
53
54 INIT_LIST_HEAD(&gl->gl_holders);
55 INIT_LIST_HEAD(&gl->gl_lru);
56 INIT_LIST_HEAD(&gl->gl_ail_list);
57 atomic_set(&gl->gl_ail_count, 0);
58 atomic_set(&gl->gl_revokes, 0);
59 }
60
gfs2_init_gl_aspace_once(void * foo)61 static void gfs2_init_gl_aspace_once(void *foo)
62 {
63 struct gfs2_glock_aspace *gla = foo;
64
65 gfs2_init_glock_once(&gla->glock);
66 address_space_init_once(&gla->mapping);
67 }
68
69 /**
70 * init_gfs2_fs - Register GFS2 as a filesystem
71 *
72 * Returns: 0 on success, error code on failure
73 */
74
init_gfs2_fs(void)75 static int __init init_gfs2_fs(void)
76 {
77 int error;
78
79 gfs2_str2qstr(&gfs2_qdot, ".");
80 gfs2_str2qstr(&gfs2_qdotdot, "..");
81 gfs2_quota_hash_init();
82
83 error = gfs2_sys_init();
84 if (error)
85 return error;
86
87 error = list_lru_init(&gfs2_qd_lru);
88 if (error)
89 goto fail_lru;
90
91 error = gfs2_glock_init();
92 if (error)
93 goto fail_glock;
94
95 error = -ENOMEM;
96 gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
97 sizeof(struct gfs2_glock),
98 0, SLAB_RECLAIM_ACCOUNT,
99 gfs2_init_glock_once);
100 if (!gfs2_glock_cachep)
101 goto fail_cachep1;
102
103 gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
104 sizeof(struct gfs2_glock_aspace),
105 0, 0, gfs2_init_gl_aspace_once);
106
107 if (!gfs2_glock_aspace_cachep)
108 goto fail_cachep2;
109
110 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
111 sizeof(struct gfs2_inode),
112 0, SLAB_RECLAIM_ACCOUNT|
113 SLAB_ACCOUNT,
114 gfs2_init_inode_once);
115 if (!gfs2_inode_cachep)
116 goto fail_cachep3;
117
118 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
119 sizeof(struct gfs2_bufdata),
120 0, 0, NULL);
121 if (!gfs2_bufdata_cachep)
122 goto fail_cachep4;
123
124 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
125 sizeof(struct gfs2_rgrpd),
126 0, 0, NULL);
127 if (!gfs2_rgrpd_cachep)
128 goto fail_cachep5;
129
130 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
131 sizeof(struct gfs2_quota_data),
132 0, SLAB_RECLAIM_ACCOUNT, NULL);
133 if (!gfs2_quotad_cachep)
134 goto fail_cachep6;
135
136 gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata",
137 sizeof(struct gfs2_qadata),
138 0, 0, NULL);
139 if (!gfs2_qadata_cachep)
140 goto fail_cachep7;
141
142 gfs2_trans_cachep = kmem_cache_create("gfs2_trans",
143 sizeof(struct gfs2_trans),
144 0, 0, NULL);
145 if (!gfs2_trans_cachep)
146 goto fail_cachep8;
147
148 error = gfs2_qd_shrinker_init();
149 if (error)
150 goto fail_shrinker;
151
152 error = -ENOMEM;
153 gfs2_recovery_wq = alloc_workqueue("gfs2_recovery",
154 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
155 if (!gfs2_recovery_wq)
156 goto fail_wq1;
157
158 gfs2_control_wq = alloc_workqueue("gfs2_control",
159 WQ_UNBOUND | WQ_FREEZABLE, 0);
160 if (!gfs2_control_wq)
161 goto fail_wq2;
162
163 gfs2_freeze_wq = alloc_workqueue("gfs2_freeze", 0, 0);
164
165 if (!gfs2_freeze_wq)
166 goto fail_wq3;
167
168 gfs2_page_pool = mempool_create_page_pool(64, 0);
169 if (!gfs2_page_pool)
170 goto fail_mempool;
171
172 gfs2_register_debugfs();
173 error = register_filesystem(&gfs2_fs_type);
174 if (error)
175 goto fail_fs1;
176
177 error = register_filesystem(&gfs2meta_fs_type);
178 if (error)
179 goto fail_fs2;
180
181
182 pr_info("GFS2 installed\n");
183
184 return 0;
185
186 fail_fs2:
187 unregister_filesystem(&gfs2_fs_type);
188 fail_fs1:
189 mempool_destroy(gfs2_page_pool);
190 fail_mempool:
191 destroy_workqueue(gfs2_freeze_wq);
192 fail_wq3:
193 destroy_workqueue(gfs2_control_wq);
194 fail_wq2:
195 destroy_workqueue(gfs2_recovery_wq);
196 fail_wq1:
197 gfs2_qd_shrinker_exit();
198 fail_shrinker:
199 kmem_cache_destroy(gfs2_trans_cachep);
200 fail_cachep8:
201 kmem_cache_destroy(gfs2_qadata_cachep);
202 fail_cachep7:
203 kmem_cache_destroy(gfs2_quotad_cachep);
204 fail_cachep6:
205 kmem_cache_destroy(gfs2_rgrpd_cachep);
206 fail_cachep5:
207 kmem_cache_destroy(gfs2_bufdata_cachep);
208 fail_cachep4:
209 kmem_cache_destroy(gfs2_inode_cachep);
210 fail_cachep3:
211 kmem_cache_destroy(gfs2_glock_aspace_cachep);
212 fail_cachep2:
213 kmem_cache_destroy(gfs2_glock_cachep);
214 fail_cachep1:
215 gfs2_glock_exit();
216 fail_glock:
217 list_lru_destroy(&gfs2_qd_lru);
218 fail_lru:
219 gfs2_sys_uninit();
220 return error;
221 }
222
223 /**
224 * exit_gfs2_fs - Unregister the file system
225 *
226 */
227
exit_gfs2_fs(void)228 static void __exit exit_gfs2_fs(void)
229 {
230 gfs2_qd_shrinker_exit();
231 gfs2_glock_exit();
232 gfs2_unregister_debugfs();
233 unregister_filesystem(&gfs2_fs_type);
234 unregister_filesystem(&gfs2meta_fs_type);
235 destroy_workqueue(gfs2_recovery_wq);
236 destroy_workqueue(gfs2_control_wq);
237 destroy_workqueue(gfs2_freeze_wq);
238 list_lru_destroy(&gfs2_qd_lru);
239
240 rcu_barrier();
241
242 mempool_destroy(gfs2_page_pool);
243 kmem_cache_destroy(gfs2_trans_cachep);
244 kmem_cache_destroy(gfs2_qadata_cachep);
245 kmem_cache_destroy(gfs2_quotad_cachep);
246 kmem_cache_destroy(gfs2_rgrpd_cachep);
247 kmem_cache_destroy(gfs2_bufdata_cachep);
248 kmem_cache_destroy(gfs2_inode_cachep);
249 kmem_cache_destroy(gfs2_glock_aspace_cachep);
250 kmem_cache_destroy(gfs2_glock_cachep);
251
252 gfs2_sys_uninit();
253 }
254
255 MODULE_DESCRIPTION("Global File System");
256 MODULE_AUTHOR("Red Hat, Inc.");
257 MODULE_LICENSE("GPL");
258
259 module_init(init_gfs2_fs);
260 module_exit(exit_gfs2_fs);
261
262